Coupling.



1. K. DALTON. COUPLING.

APPLICATION FILED JULY 9. |914.

1,1 60,050. Patented Nov. 9, 1915.

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JAMES K. DALTON, OF WAVERLY, OHIO.

COUPLING.

Specification of Letters Patent.

Patented Nov. 9, 1915.

Application filed July 9, 1914. Serial No. 850,011.

To all whom it may concern:

Be it known that I, JAMES K. DALToN, a citizen of the United States, residing at lVaverly, in the county of Pike and State of Ohio, have invented new and useful lmprovements in Couplings, of which the following is a specification.

The invention provides means whereby pneumatic devices may be inflated to a predetermined degree of pressure, thereby preventing excessive pressure when inflating.

The invention provides means for connecting aY flexible tube to the ordinary air valve of a pneumatic tire or like part, means for indicating the pressure, and means for relieving such pressure when the predeterbeing combined in a single structure which involves a simple and compact arrangement of elements which are easily7 operable and positive and certain in action.

The invention consists of the novel features, details of construction and combination of parts, which hereinafter will be more particularly set forth, illustrated in the accompanying drawing, and pointed out in the appended claim.

Referring to the drawing, forming a part of the specification, Figure 1 is a view in elevationof a combined connector, pressure indicator and regulator embodying the invention. Fig. 2 is a central longitudinal section. Fig. 3 is a section on the line of Fig. 2.

Corresponding and like parts are referred to in the following description, and indicated in all the views of the drawing, by the same reference characters.

The coupling comprises a body having'four coupling ends, said body havingr an opening in which -a plug 51 is mounted to turn, said plug having a threaded socket at one end to make connection with the threaded end of an air valve A. such as commonly provided 1n connection wlth pneumatic tires or like devices to be inflated.

the stem -when it is required to advance or retract the same. rl`he inner portion of the stem 53 is reduced and is adapted to enter the opening of the air valve A so as to engage with the stem of the'closing valve and hold the same open during the operation of inflating the tire or like part. An end piece 54 is threaded to one of the ends of the body 50 and is adapted to have a flexible tube 4S connected thereto, said tube extending from a suitable Isource of air supply. A spring actuated valve 55 closes the opening through the part 5l and prevents any loss of pressure.

A short tube 56 is threaded to the coupling` `end of the part 50 opposite the connection 54 and said tube is internally threaded at its outer end to receive a collar 63 which receives a tube 59 having an outwardly extending flange 59 at its inner end against which one end vof an expansible helical spring 62 engages. the opposite end of such spring engaging the inner end of the collar 63. r[he tube 59 is slidable in the collar 63 and is provided in its length with graduations 64, which indicate the pressure according to the relative position of the tube 59 with reference to the collar 63. A disk 58 is slidable within the inner end of the tube 56 and is provided at a central point with 4an opening which is beveled to provide a valve seat upon which a valve 57 closes, said valve being held seated by means of an ex- `pansible helical spring 60` which is mounted upon the stem of the valve 57 and is confined between such valve and a tube 61 threaded into the tube 59. ,A whistle 65 is located at the outer end of the tube 61 and giveswarning when the valve 57 is unseated. This alarm is of particular advantage when the device is used after dark,l thereby giving warni'ng when the tire or like part is inflated to the required pressure. 'lt is to be understood that the tube 61 may be adiusted to lregulate the tension of the spring 60 so that the valve 57 may unseat at any pressure..

After proper connection vis made the valve of the part A is tapped in the usual Way or may be held open by means of the stem 53. After proper connection is made the air pressure is turned on and after the tire or other part has been inflated to the predetermined degree, which is made known by the scale indication on the tube 59, the valve 57 opens, thereby permitting excessive pressure to escape through the tube G1, such escape of pressure being made known by thel sounding of the whistle or alarm (35.l The stem 53 is now backed to permit seating of,

the valve of the part A, after which the plug 5l is turned to disconnect the same from the air valve A.

It will be understood from the foregoing,

taken in connection with the accompanying l described the principle of operation of the invention.v together with the device which I now consider to be the best embodiment thereof. l desire to have it understood that the device shown is merely illustrative, and that such changes may be made when desired as are within the scope of the claim lappended hereto.

Having thus described the invention what is claimed as new, s:-

A coupling comprising a rotatably mounted plug adapted to have threaded engagement with a valve, a stem adjustably mounted therein and adapted to open said valve when moved in one direction, a hollow body' encircling said plug and rotatable there around, a tube threaded into said body, a collar threaded within the tube.- a second tube slidably mounted within the first mentioned tube and collar and provided with scale graduations, said second tube having one extremity flanged, an expansion spring mounted between the collar and the flanged extremity of the tube slidable therein, a valve seat slidable in the first mentioned tube and movable with the second mentioned tube, a relief valve closing upon the valve seat, a spring for holding the relief valve vseated and a third tube threadedfinto the second tube and adapted to vary the tension of the spring holding the relief valve seated.

In testimony whereof I affix my signature in presence of two witnesses.

y JAMES K. DALTON.

Witnesses:

PERIS HUTT, THos. A. BROWN. 

